Wow - this Canadian stuff is really amazing. God help the detail oriented honest person! We try to declare purchases liberally and have never been asked to pay anything even though we were over a couple times - jewelry can get you up there pretty quickly. Years ago, coming back into US from SXM, we had actually purchased/acquired nothing - zero - and we put zero on form. That was the only time we have ever been picked for the secondary screening and they actually opened our bags and looked through our stuff. They very quickly lost interest in us - the wife claims they quickly realized that we are just cheap. Ever after we put at least some positive number greater than zero on the form - and we almost always have acquired stuff anyway.